Keyboard



FIG. 1 is a top right front isometric view of a keyboard showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevational view thereof; and,

FIG. 4 is a front elevational view thereof.

The undisclosed left side view is a mirror image of the right side and the bottom view is flat and unornamented. 

The ornamental design for a keyboard, as shown and described. 